Thermal Performance of a Triple-Glazed Exhausting and Ventilating Airflow Window System

摘要

The thermal performance and optimum design of a triple-glazed exhausting and ventilating airflow window system are studied numerically using a finite volume method. Exhausting and ventilating airflow rate, solar insolation, and aspect ratio are identified as important governing parameters. Effort is directed toward the reduction in space cooling and heating load. It is found that both space-heat gain and space-heat loss are reduced considerably by increasing the exhausting and ventilating airflow rate. The optimum airflow rate (Reynolds number) and aspect ratio are found to be about 600 and 0.05, respectively. Comparisons between the airflow window system and the enclosed window system are made qualitatively and quantitatively. The airflow window system with zero Reynolds number corresponds to the enclosed window case. The present airflow window model can be used year round, as an exhausting airflow type in summer and as a ventilating airflow type in winter.